Corning 7980 Glass

Glass Type: Fused Silica


Corning 7980 is manufactured by Corning . It is a result of melting synthetically derived silicon dioxide and is used in many of the same applications as fused quartz. The main differences are that fused silica transmits better in the UV and fused quartz is lower in OH content. Both are highly pure, have high chemical resistance, good thermal shock resistance, and low thermal expansion coefficient. SGP can CNC mill, cut, drill, lap, and polish 7980 into any dimension or surface finish.

Thermal PropertiesMechanical Properties
Thermal Coefficient of Expansion(0/300°C): 5.5 X 10 -7/°CDensity2.201 g/cm3
Annealing Point1042°C/1907.6 °FKnoop Hardness522 Kg/mm2
Softening Point1585°C / 2885 °FYoung's Modulus72.7 Gpa
Strain Point893°C/1639.4°FPoisson's Ratio.16
Chemical PropertiesElectrical Properties
Hydrolytic ResistanceN/ADielectric ConstantE=3.8
Acid ResistanceN/AResistivityN/A
Alkali ResistanceN/ADielectric StrengthN/A
Optical Properties
Refractive Index1.45840 (589 nm)